mysql备份脚本

Posted 2020-10-16 tengfei520

#!/bin/bash

############功能说明部分#######################################
#脚本功能是按照每天对mysql数据库中所有表进行备份，备份文件为：数据库名-表名.sql
#实例：backup/2016-08-25/uic-test.sql
#测试数据还原实例：mysql -uroot -pxxx uic< backup/2016-08-25/uic-test.sql

###############脚本变量定义##################################
MYSQL_HOME=/home/work/mysql
MYSQL_DUMP=/home/work/mysql/bin/mysqldump
BACKUP_HOME=/home/work/mysql/backup
save_time_threshold=7 #备份天数
BACKUP_DATA_PATH=$BACKUP_HOME/$(date +%F)
#RM_DATA_PATH=$BACKUP_HOME/$(date -d "-30 days" +%F)
PASS=$(grep password /home/work/mysql/etc/root.cnf |sed s/[[:space:]]//g|awk -F‘=‘ {‘print $2‘})
USER=‘root‘
HOST=‘127.0.0.1‘

###############函数部分#######################################
function backupMysql(){
    local db=$1
    local table=$2
    local dbdir=$3
    local backfile="${dbdir}/${db}-${table}.sql"
    $MYSQL_DUMP --skip-lock-tables -h${HOST} -u${USER} -p${PASS} $db $table | gzip > ${backfile}.gz
}

##########脚本逻辑部分#########################################
ls $BACKUP_HOME &>/dev/null || mkdir $BACKUP_HOME
chown work.work $BACKUP_HOME
ls $BACKUP_DATA_PATH &>/dev/null || mkdir $BACKUP_DATA_PATH
chown work.work $BACKUP_DATA_PATH
find $BACKUP_HOME/ -maxdepth 1 -type d -mtime +7 -exec rm -rf {} \;
#if [ -d $RM_DATA_PATH ];then
#    rm -rf $RM_DATA_PATH    
#fi
cd $BACKUP_DATA_PATH || exit

echo "begin backup mysql"
cmd="show databases"
cnt=$(mysql -h${HOST} -u${USER} -p${PASS} -s -e "${cmd}")
for db  in $cnt
do
    cmd="use $db;show tables"
    tablelist=$(mysql -h${HOST} -u${USER} -p${PASS} -s -e "${cmd}")
    for table in $tablelist
    do
    if [ "$table" == "project_files" ] ;then
        cmd1="use table;SELECT project_id,version,chunk,size from $table"
        mysql -h${HOST} -u${USER} -p${PASS} -s -e "${cmd1}" | gzip > ${BACKUP_DATA_PATH}/${db}-${table}_txt.gz 
    else
        backupMysql "$db" "$table" "$BACKUP_DATA_PATH"
    fi
    done
done